What should I do if my Xiaomi phone is unable to detect the SIM card, despite being properly inserted?

If your Xiaomi phone is unable to detect the SIM card despite being properly inserted, you can try the following steps:1. Restart your phone: Sometimes a simple restart can fix the issue. Turn off your phone, remove the SIM card, reinsert it, and then turn on your phone again.2. Clean the SIM card: Dust and dirt may prevent proper contact between the SIM card and the phone. Gently clean the SIM card with a soft cloth and reinsert it.3. Check for software updates: Make sure your phone's software is up to date. Go to Settings > About phone > System update to check for any available updates.4. Reset network settings: Sometimes network settings can cause issues with detecting the SIM card. Go to Settings > SIM cards & mobile networks > Reset network settings.5. Try a different SIM card: Test if the issue is with your SIM card by trying a different SIM card in your phone. If the new SIM card is detected, then the issue may be with your original SIM card.If none of these steps resolve the issue, it may be a hardware problem. In that case, you may need to contact Xiaomi customer support or visit a service center for further assistance.